Description: 【Premium Material】: Made from carbon fiber for durability and efficiency, the heating pad is a must have for every household. 【Versatile USB Constant Temperature Heating Pad】: The Thermostat Heat Preservation Plate is perfect for warming up food bags, baby bottles, lunch boxes, and more. It works best when used with an insulation bag to keep your meals warm for longer periods. 【High Performance Carbon Fiber Heating Sheet】: The heating sheet is made of carbon fiber, a superior material known for its excellent heat conversion properties. It offers high efficiency and energy saving benefits while being easy to use. 【Suitable Size】: The heat preservation plate measures 6cmx22cm/2.36inchx8.66inch in size, making it compact yet effective. 【Ideal for Outdoor Use】: Whether you're going on a picnic or a school trip, this 5V heating pad is your perfect companion to keep your food warm outdoors. Specification: Material: Carbon Fiber Size Chart: 6cmx22cm/2.36inchx8.66inch Package Includes: 1 USB Thermostat Heating Pad Note: Please allow slightly errors due to manual measurement and different monitors.